ROLLS ROYCE SILVER SHADOW HEATER PROBLEM

1967 Rolls Royce Silver Shadow

1967 Rolls Royce Silver Shadow

The heater core and radiator for this car, I am in the process of restoring the car. I am placing a 354 chevy engine and transmission in it. Can I keep the original radiator and heater core for this or can I replace it with a newer model and it still fit and work properly?